RS0208
8-Bit Bidirectional Voltage-Level Translator with
Automatic Direction Sensing
DESCRIPTION
FEATURES
•
•
•
•
•
•
•
•
•
No Direction-Control
Data Rates
100Mbps
1.2V to 3.6V on A ports and 1.65V to 5.5V on
B Ports (VCCA≤VCCB)
VCC Isolation Feature: If Either VCC Input is at
GND, Both Ports are in the High-Impedance
State
OE Input Circuit Referenced to VCCA
Low Power Consumption,10uA Maximum ICC
No Power-Supply Sequencing Required:
Either VCCA or VCCB can be Ramped First
IOFF: Supports Partial-Power-Down Mode
Operation
Extended Temperature: -40°C to +85°C
APPLICATIONS
•
•
•
•
Handset
Smartphone
Tablet
Desktop PC
This 8-bit non-inverting translator is a bidirectional
voltage-level translator and can be used to establish
digital switching compatibility between mixed-voltage
systems. It uses two separate configurable power-supply
rails, with the A ports supporting operating voltages from
1.2V to 3.6V while it tracks the VCCA supply, and the B
ports supporting operating voltages from 1.65V to 5.5V
while it tracks the VCCB supply. This allows the support of
both lower and higher logic signal levels while providing
bidirectional translation capabilities between any of the
1.2V,1.5V,1.8V, 2.5V,3.3V and 5V voltage nodes.
VCCA must not exceed VCCB.
When the output-enable (OE) input is low, all outputs are
placed in the high-impedance state, which significantly
reduces
the
power-supply
quiescent
current
consumption.
OE has an internal pull-down current source, as long as
VCCA is powered.
To ensure the high-impedance state during power up or
power down, OE should be tied to GND through a pulldown resistor; the minimum value of the resistor is
determined by the current-sourcing capability of the
driver.
The RS0208 is available in Green QFN3*3-20L and
TSSOP20 packages. It operates over an ambient
temperature range of -40°C to +85°C.
Device Information (1)
PART
NUMBER
RS0208
(1)
REV A.3
1 / 19
PACKAGE
BODY SIZE (NOM)
TSSOP20(20)
6.50mm×4.40mm
QFN3*3-20L(20)
3.00mm×3.00mm
For all available packages, see the orderable addendum at the
end of the data sheet.
www.run-ic.com
RS0208
Functional Block Diagram
One
Shot
One
Shot
One
Shot
One
Shot
One
Shot
One
Shot
2 / 19
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RS0208
Revision History
Note: Page numbers for previous revisions may different from page numbers in the current version.
VERSION
Change Date
Change Item
A.0
2021/1/20
Preview version completed
A.1
2021/4/25
A.2
2021/11/01
A.3
2022/1/13
Initial version completed
1. Added Detailed Description and Application Information
2. Correct the maximum of OE Input leakage current
3. Add TAPE AND REEL INFORMATION
Added Switching Characteristics Min and Max value
3 / 19
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RS0208
PIN CONFIGURATIONS
(TOP VIEW)
A1
1
20
B1
VCCA
2
19
VCCB
A2
3
18
B2
A3
4
17
B3
A4
5
16
B4
A5
6
15
B5
A6
7
14
B6
A7
8
13
B7
A8
9
12
B8
OE
10
11
GND
(TOP VIEW)
QFN3*3-20L
TSSOP20
PIN DESCRIPTION
PIN
(1)
NAME
TYPE (1)
19
A1
I/O
20
VCCA
P
3
1
A2
I/O
Input/output A2. Reference to VCCA.
4
2
A3
I/O
Input/output A3. Reference to VCCA.
5
3
A4
I/O
Input/output A4. Reference to VCCA.
6
4
A5
I/O
Input/output A5. Reference to VCCA.
7
5
A6
I/O
Input/output A6. Reference to VCCA.
8
6
A7
I/O
Input/output A7. Reference to VCCA.
9
7
A8
I/O
10
8
OE
I
11
9
GND
‒
Input/output A8. Reference to VCCA.
Output Enable (Active High). Pull OE low to place all outputs in
3-state mode. Referenced to VCCA.
Ground.
12
10
B8
I/O
Input/output B8. Reference to VCCB.
13
11
B7
I/O
Input/output B7. Reference to VCCB.
14
12
B6
I/O
Input/output B6. Reference to VCCB.
15
13
B5
I/O
Input/output B5. Reference to VCCB.
16
14
B4
I/O
Input/output B4. Reference to VCCB.
17
15
B3
I/O
Input/output B3. Reference to VCCB.
18
16
B2
I/O
Input/output B2. Reference to VCCB.
19
17
VCCB
P
20
18
B1
I/O
-
Exposed Pad
GND
-
TSSOP20
QFN3*3-20L
1
2
FUNCTION
Input/output A1. Reference to VCCA.
A Port Supply Voltage.1.2V ≤ VCCA ≤ 3.6V and VCCA ≤ VCCB.
B Ports Supply Voltage.1.65V ≤ VCCB ≤ 5.5V.
Input/output B1. Reference to VCCB.
Exposed pad should be soldered to PCB board and connected
to GND or left floating.
I=input, O=output, I/O=input and output, P=power
4 / 19
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RS0208
SPECIFICATIONS
Absolute Maximum Ratings
Over operating free-air temperature range (unless otherwise noted) (1)
SYMBOL
PARAMETER
MIN
MAX
UNIT
VCCA
Supply Voltage Range
-0.3
4.6
V
VCCB
Supply Voltage Range
-0.3
6.5
V
A port
-0.3
4.6
VI(2)
Input Voltage Range
B port
-0.3
6.5
OE
-0.3
4.6
Voltage range applied to any output in the highimpedance or power-off state
A port
-0.3
4.6
B port
-0.3
6.5
Voltage range applied to any output in the high or
low state
A port
-0.3
VCCA+0.3
B port
-0.3
VCCB+0.3
IIK
Input clamp current
VI
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